ES2725976T3 - Treatment unit with tissue fluid or cellulosic material as well as fluid treatment procedure - Google Patents

Abstract

Manifold for use in a fluid treatment unit for a tissue, cellulosic material or other fibrous material (12), which has at least one manifold (38, 40) for blowing the fluid over the tissue, cellulosic material or other fibrous material ( 12) that it is continuously guided beyond at least one manifold (38, 40), comprising a housing (64) of the manifold; a port (46) that is provided on one side of the manifold (38, 40); a nozzle plate (44) having at least one outlet opening (62) through which the fluid is blown on said tissue or cellulosic material (12); and a conduit for guiding the fluid from said port (46) to said nozzle plate (44), characterized in that said conduit has a central feed channel (42) that guides the fluid from said port (46) to a central area of the manifold (38, 40), as well as two distribution channels (48, 50) and at least one flow guide in said central area to evenly distribute the fluid through said plate of said nozzle (44) that extends to both sides of the central area and that is fed from said central feed channel (42).

Description

DESCRIPTION

Tissue fluid treatment unit or cellulosic material as well as fluid treatment method Field of the invention

The present invention relates to a fluid treatment unit for tissue or cellulosic material that includes a manifold for such a fluid treatment unit, as well as a fluid treatment procedure.

Prior art

WO03 / 038364A1 discloses a residual heat recovery device, a self-filtration device for cleaning water and an exhaust gas regeneration device for branches. In the aforementioned device, the textile product (TX) woven by a knitting machine is immersed in a mixture of water, resin and chemicals in a sedimentation tank (ST), is dehydrated by a juicer (MG) and dried and it is treated by heat using several cameras (CH1 to CH4) to improve its quality. Each of the chambers (CH1 to CH4) comprises a main body (CM) surrounded by an insulating material (IS), and hundreds of hot air nozzles (HN) to release hot air to an upper and lower side of the textile product (TX) that is going through the center of the main body (CM). The hot air nozzles (HN) are arranged in several hot air distribution boxes (HD) connected to a hot air pipe (HP), and the hot air heated by a heater (HT) cycles in the air pipe hot (HP) using a hot air blower (HB). Each of the gas exhaust pipes (GP) is placed on the upper side of each of the chambers (CH1 to CH4), with two gas exhaust pipes (GP) being connected to a main gas exhaust pipe (GM) and an extractor-blower (BW) being connected to the main gas exhaust pipe (GM). In other words, the cold air that flows into each chamber through its inlet and out through its outlet is mixed with the air cycle in the chamber and is heated by the heater (HT) at a predetermined temperature. , heated hot air flows through the hot air blower. (HB) through the hot air pipe (HP) and the hot air distribution boxes (HD) to the hot air nozzles (HN), and the textile material (TX) that passes between the air nozzles Upper and lower hot (HN) is dried or heated by hot air that is injected through hot air nozzles (HN). When the drying process or heat treatment of the textile product (TX) is carried out, the moisture contained in the textile product (TX) is vaporized to form steam during the drying process, and a gas containing the resin and chemical products It is generated from the textile product (TX) during the heat treatment process.

However, the device mentioned above does not allow a symmetrical and uniform air impact on the material (fabric).

US Patent No. 4,586,268 teaches a horizontal heat treatment tunnel for the treatment of fibers, threads, cut film or similar fibrillar material used in the textile field, in which the material to be heat treated is transported side by side. along a displacement path, in the form of an endless length, through the horizontally arranged tunnel, said tunnel comprising a thermally insulated housing having a treatment chamber, input means for allowing the material to enter and exit means to allow the removal of the material from the housing; a ventilation chamber; ventilation means arranged within said ventilation chamber to effect the circulation of a gaseous treatment medium within said housing and through said treatment chamber; heating means arranged downstream of said ventilation means in the treatment chamber to heat said treatment means before the treatment means makes contact with the fibrillar material that moves along said travel path through of said treatment chamber; connection means of the fan inlet positioned solely to aspirate the gas treatment means of the travel path; fan exhaust means positioned solely to direct the gas treatment medium towards the path of travel through the fibrillar material and towards the fan intake connection means; the aforementioned ventilation intake connection means including a ventilation intake chamber that conically narrows away from the travel path on both sides towards the center of the travel path to promote a uniform flow of the treatment medium through the material fibrillar; said heating means extending in parallel to and in close juxtaposition with the travel path along the entire length and width of the travel path; screen wall means arranged above and below said heating means to regulate the flow of treatment means through said heating means, whereby heat is retained around said two heating means; means for sealing the marginal zones of the heating means so that said zones are gas tight to avoid heat loss from said heating means; and guide means outside said thermally insulated housing for transporting the fibrillar material along said travel path through the treatment chamber within said housing in a contact free manner.

However, the device mentioned above does not indicate or teach the object of the present invention.

Rames and similar equipment, such as hot exits, relax dryers or band dryers, are used for the hot air treatment of fabrics, especially for drying, thermal fixing or so-called finishing in textile products or relatively wide paper tissues.

In doing so, the tissues to be treated are continuously guided through the so-called fields or cameras using a suitable transport system, which are chains in the case of branches that have fasteners for the two edges of the product and with mesh straps in the case of relaxation dryers, in which the fabrics are subjected to hot air (also known as process air) in order to dry the fabric and fix it by heat by heating at a certain temperature or to allow certain chemical reactions during the so-called finish.

For this purpose, the hot air that is normally heated to temperatures of 220 ° C is applied using many nozzles to one or both sides of the fabric being continuously guided through the nozzles. In the process, it is important to maintain a uniform distribution of hot air flow as far as possible so that the result of the treatment is uniform throughout the entire width of the fabric.

The hot air is distributed using the so-called nozzles that are arranged above and / or below the fabrics and to which the preheated hot air is supplied using at least one blower.

In addition, several prior art designs are also known in which it can be supplied to the upper nozzle and the lower nozzle using separate blowers. For certain applications, nozzles that act only from above or below are intended.

The nozzle fingers, which have a specularly symmetrical design, discharge the hot air through a nozzle plate, which is oriented towards the fabric, using a series of equidistant holes that act as hot air nozzles.

The cross section and hole geometry may be different. Alternatively, the hot air can also be discharged through one or several elongated slots.

In general, several nozzles that are restricted by the use of housing walls in the direction of the paper plane are arranged one behind the other in the direction of tissue transport, which is later referred to as a longitudinal direction, that is, in right angles to the plane of the paper. The direction at right angles with the direction of tissue transport later is referred to as the transverse direction.

The individual nozzles are arranged in the longitudinal direction with a space such that there are spaces through which the "used" hot air can circulate back to an exhaust chamber. Hot air is heated here, for example, using a forced air burner, which is an example of a hot air treatment configuration using a direct heating system. Alternatively, indirect heating systems, such as steam or oil circulation heating systems, can be used.

The heated chamber air is fed mainly to the blower inlet. A part of the process air, in which substances (for example, water, finishing chemicals or residual solutions of the spinning process and tissue pretreatment) accumulate, which evaporate or sublimate from the fabric and also contain The combustion gases of the forced air burner in the case of direct heating systems, are removed from the circulation air by means of an exhaust pipe using an exhaust fan or fans. The hot air fed from the (front) side to the inside of the nozzles has proven itself in the case of this hot air treatment system because there are many advantages to the design and maintenance of the system.

The disadvantage of this design is an effect related to the flow that causes the hot air stream from the nozzle to tip in the direction of the flow (air), that is, the end of the nozzle and not at a right angle to the plane of the tissue. The angle of inclination is the result of the cosine arc of the sum of relationships of the cross-sectional area of the air outlet with the cross-sectional area of the air inlet of a nozzle. The result of this is that the air that hits the fabric is not deflected uniformly to the right and to the left in the transverse direction, but that more air flows to the right in the direction of the end of the nozzle that in the opposite direction. This means that there is more process air at a higher flow rate in the area of the edge of the tissue that is in the direction of the end of the nozzle than in the opposite area. This resulting difference in heat transfer results in a waste of different unacceptable tissue in the edge area, both during drying and during the adjustment and finishing processes (the so-called non-right / left joint).

Different approaches to the current technique are known to prevent this:

In one approach, the so-called "obstacle edges" are used, which ensure an approximately perpendicular deflection of air from the nozzle openings, square in this case, by means of the formation of vortices and, therefore, ensure a uniform discharge on the tissue. However, the aerodynamic losses of this approach due to the formation of vortices that are taken into account and the unfavorable restriction factor caused by the use of square nozzle cross sections are relatively high.

In another approach, the nozzles are staggered to obtain a perpendicular air discharge, that is, the nozzles are provided with a compensation angle with respect to the vertical plane using a zigzag design of the nozzle wall, which compensates for the discharge angle with the highest possible precision in the case of "straight" non-staggered nozzles. However, this approach is significantly more complex in terms of production and results in additional aerodynamic losses due to the slightly zigzag-shaped nozzle wall that is folded.

The problem of the non-uniform treatment of the tissue described here, as is generally known, for example, in small laboratory branches, can basically be prevented by supplying air to the nozzle in the center with respect to the transverse direction and progressively narrowing the nozzle from the center to both sides, which typically resembles the dome shape of a chimney.

In the case of such a flow configuration, the hot air is also not discharged vertically from the individual nozzles everywhere. In fact, there is a slightly divergent angular distribution on both sides.

However, this angular distribution behaves as approximately symmetrically specular with respect to the center, which at least produces a uniform result and, in many cases, even a better treatment in practice compared to a completely vertical air discharge.

However, the design of such an air supply from the center would be very complex to implement in the case of many known hot air treatment systems in an industrial standard.

The ease of maintenance of the nozzles would be significantly reduced, especially by supplying the air from the center in the design in question with respect to the usual lateral hot air supply, the nozzles are mounted in such a way that they can move in the transverse direction for maintenance purposes and can be easily removed from the opposite side of the air supply for maintenance and cleaning purposes. An adequately pressure-tight connection can be implemented in the feed channel using a simple flange with gaskets in the area of the plane against which the nozzles are pressed with a preload in the assembled condition. In the case of the central supply in question using a separate common air supply channel for all the nozzles to which a blower is supplied, a convenient and lateral option of this type for removing the nozzles using a practically automatic flange in the channel of feeding would be very complex to implement, if possible.

In addition, the height of the treatment chamber should also be increased in general to accommodate a central hot air feed channel.

In this way, there is a need in the art for a fluid treatment unit that is of simple construction as well as with a low design cost. Therefore, an object of the present invention is to develop a fluid treatment unit that is aerodynamically efficient and economical.

Object of the invention

The objective of this invention is to develop a simple construction fluid treatment unit for the treatment of tissues, cellulosic material or other fibrous material comprising at least one manifold for blowing the fluid on the cellulosic tissue or material.

Another object of the present invention is to develop a fluid treatment unit with a low design cost and which is aerodynamically effective in accordance with the description mentioned herein and below.

Still another additional object of the present invention is to provide a fluid treatment unit that does not have any disadvantages compared to a conventional nozzle in terms of maintenance and assembly space requirements.

A further object of the present invention is to provide a fluid treatment process with low design cost and which is aerodynamically effective, in which a symmetric distribution of the fluids with good treatment results can be obtained.

Summary of the invention

The fluid treatment unit for a tissue or cellulosic material (12), which has at least one manifold (38, 40) to blow the fluid over the tissue or cellulosic material (12) that is continuously guided through at least one manifold (38, 40), in which the at least one collector (38, 40) comprises:

a housing (64) of the collector;

a port (46) that is provided on one side of the manifold (38, 40);

a nozzle plate (44) having at least one outlet opening (62) through which the fluid is blown onto said tissue, cellulosic material or other fibrous material (12); Y

a conduit for guiding the fluid from said port (46) to said nozzle plate (44),

which is characterized by the fact that

said conduit has a central feed channel (42) that guides the fluid from said port (46) to a central area of the manifold (38, 40), as well as two distribution channels (48, 50) and at least one flow guide in said central area for uniformly distributing the fluid through said nozzle plate (44) that extends to both sides of the central area and that is fed from said central feed channel (42).

Typically, the central feed channel (42) of the manifold (38, 40) is designed as an integral unit. Typically, the height of the two distribution channels (48, 50) decreases progressively sideways and the central feed channel (42) and one of the distribution channels (48) are separated by a common wall (60) in the less a part of the area.

Typically, the central feed channel (42) has a progressive decrease toward the center that is complementary to the profile of the adjacent distribution channel (48).

Typically, an initial flow guide (54) is provided in the first transition area between the central feed channel (42) and the distribution channels (48, 50), which divides the fluid stream into two partial streams for the two distribution channels (48, 50) and deflects approximately 90 °.

Typically a second flow guide (52) is provided in a second transition area that connects to the first transition area and protrudes into the two distribution channels (48, 50), which basically guides the two partial currents symmetrically in the direction of the two distribution channels (48, 50).

Typically, the second flow guide (52) is provided with a passage for supplying fluid to the outlet openings (62) that are located directly in the center and in which the flow would otherwise be partially affected.

Typically, an additional flow guide (58) is provided at a leading end of said wall (60) between said central feed channel (42) and the adjacent distribution channel (48).

Typically, the nozzle plate (44) has many oval, circular, rectangular or slot-shaped outlet openings (62).

Typically, the walls of said outlet openings (62) may normally be arranged at the surface of the nozzle plate (44) or longitudinally at an angle thereto and at which the outlet openings (62) may be arranged in one or several rows, with or without displacement of one another.

Typically, the nozzle plate (44) has at least one narrow groove as an outlet opening (62) that extends along a large part of the transverse length of the manifold. Typically, rows of manifold manifolds (38, 40) are provided on both sides of the tissue or cellulosic material (12) to be treated, between which spaces are provided to discharge the ejected fluid through the outlet openings (62), in which the respective rows of collectors (38, 40) are staggered on both sides with each other such that the spaces and the outlet openings (62) are at least partially opposite each other.

Typically, the fluid is continuously blown onto the surface of the cellulosic tissue or material (12) which is continuously guided by at least one manifold (38, 40) having a nozzle plate (44),

which is characterized by the stages of

a) guiding a fluid stream through the manifold (38, 40) from one side to a central area;

b) basically divide the fluid stream into two partial streams; Y

distribuir las dos corrientes parciales a la placa de boquilla (44) en ambos lados del área central.C)

Distribute the two partial streams to the nozzle plate (44) on both sides of the central area.

Description of the invention

The fluid treatment unit, especially the hot air treatment unit for textile fabrics and the process for treating tissue according to the present invention will be described below with reference to the accompanying drawings in which the same numbers are used to denote the same parts. However, the cited drawings only illustrate the invention and in no way limit the invention.

In the accompanying drawings:

Figure 1: shows a perspective view of the collector according to one of the embodiments as described in the invention;

Figure 2: shows a perspective view of the fluid treatment unit according to one of the preferred embodiments of the invention with two manifolds and a qualitative illustration of the resulting flow pattern;

Figure 3: shows an enlarged view of the central part of said collector as shown in Figure 1.

The following are the details of the main components of the blower manifold assembly according to the invention, which are used with reference from Figure 1 to Figure 5:

12 = tissue, cellulosic material or other fibrous material

22 = delivery end

38, 40 = collector

42 = central feed channel

44 = nozzle plate

46 = port

48 = left distribution channel

50 = right distribution channel

54 = current divider plate

56 = initial flow guide

52 = second flow guide

58 = additional flow guide

60 = wall

62 = exit openings

64 = collector housing

According to the invention, the fluid treatment unit has a port (46) for fluid inlet, especially hot air, a central feed channel (42) that guides the hot air from the port to a central area of the manifold (38, 40), as well as two distribution channels (48, 50) that extend to both sides of the central area and are fed by the central feed channel (42) and distribute and blow hot air over the fabric (12) through the nozzle plate (44).

When the hot air is initially guided to a central area and then, from there, to both sides inside a manifold (38, 40), a symmetrical flow pattern is finally generated which in turn produces a uniform treatment result on both sides. Furthermore, the resulting flow pattern, which is slightly divergent, requires a certain amount of transverse stretching of the tissue, cellulosic material or other fibrous material (12) (the so-called width stretch), which for example is advantageous for drying of fabric stretched in a relaxation dryer.

The term "center" or central area does not necessarily have to mean the exact geometric center of the collector (38, 40) in the transverse direction, but must include a certain part of the central area of the collector (38, 40). It's more either the geometric center of the tissue (12) guided through the system in the transverse direction which is relevant for a uniform treatment result.

Due to the fact that the central feed channel (42) is part of the manifold (38, 40) and that hot air can be fed from the side, the design of the manifold (38, 40) of the invention has no disadvantages. compared to a conventional nozzle in terms of maintenance and mounting space requirements. Since individual corrective measures for the discharge angle such as obstruction edges and staggering of the manifold (38, 40) and the central feed channel (42) can be avoided are of simple design and are advantageous to implement aerodynamically, excellent aerodynamics can be achieved with little effort, which reduces the manufacturing cost of the assembly, as well as the energy consumption of the system.

In an advantageous design of the invention, the central feed channel (42) is shown as an integral unit with the manifold (38, 40).

The two distribution channels (48, 50) preferably narrow gradually towards the sides and the central feed channel (42) and at least one of the distribution channels (42) are separated by a common wall (60) at least in a partial section

In addition, the central feed channel (42) preferably has a progressive narrowing that is complementary to the profile of the adjacent distribution channel (48). Through this design, the central feed channel (42) can be implemented with minimal design effort, in which the maximum mounting height of the manifold (38, 40) can remain unchanged.

As an alternative to the staging of the central feed channel (42) with a distribution channel (48) as described above, the central feed channel (42) can also be designed as a separate pipe as long as the central feed channel (42) and the manifold (38, 40) can be removed from the system as a common unit.

Preferably, an initial flow guide (52) is provided in the first transition area between the central feed channel (42) and the distribution channels (48, 50), which divides the hot air stream into two partial streams for the two distribution channels (48, 50) and deflects about 90 °.

In addition, a second flow guide (52) is preferably provided in a second transition area that connects to the first transition area and protrudes inside the two distribution channels (48, 50), which basically guide the two partial currents symmetrically in the direction of the two distribution channels (48, 50).

In order to ensure an adequate supply of air to the outlet openings (62) that are located in the central area, the second flow guide (52) may be provided with a passage for supplying hot air to the outlet openings ( 62) which are located directly in the center and in which the flow would be partially affected. The nozzle plate (44) can be designed differently, especially it can include many oval, circular, rectangular or slot-shaped outlet openings (62), in which the walls of the outlet openings (62) can be arranged normally to the surface (12) of the fabric or at an angle with this surface and in which the outlet openings (62) can be arranged in a row or in several rows, arranged with or without displacement from one another.

As an alternative to the individual outlet openings (62) arranged in rows, the nozzle plate (44) can also have at least one narrow groove as an outlet opening (62) that extends along a large part of the length transverse of the collector (38, 40).

In a preferred design of the invention, rows of several manifolds (38, 40) are proposed on both sides of the fabric to be treated (12), between which spaces are provided to discharge the expelled air through the outlet openings (62 ), in which the respective rows of manifolds (38, 40) are staggered on both sides of each other such that the air outlet spaces and openings (62) are at least opposite each other. In addition, a procedure is proposed to address the task of treatment with hot air of the fabric (12) mentioned at the beginning, in which the hot air is continuously blown on the surface of the fabric (12) which is guided beyond at least one manifold (38, 40) having a nozzle plate (44). The procedure consists of the following stages:

a) guiding a stream of hot air through the manifold (38, 40) from one side to a central area, b) basically dividing the stream of hot air into two partial streams and

c) distribute the two partial streams to the nozzle plate (44) on both sides of the central area.

A manifold (40) according to the invention has a nozzle plate (44) according to figure 1 through which hot air is blown on a tissue (12) (not shown in figure 1), in this case above the collector (40). This is accomplished using outlet openings (62) that are equidistant and arranged in the nozzle plate (44) using circular holes. Under the flat nozzle plate (44), the manifold (40) is separated from the surrounding area by a housing (64) of the manifold.

Hot air or process air is introduced into the manifold (40) through a port (46).

The hot air that is fed first is guided to a central area of the manifold (40), with reference to the cross section, through a central feed channel (42). From there, the air stream is basically divided into two parts that flow into two distribution channels (48, 50) that are arranged on both sides of the center. These distribution channels (48, 50) are immediately adjacent to the nozzle plate (44), so that hot air can be discharged through the outlet openings (62) and blown on the tissue (12) located by over.

The two distribution channels (48, 50) are closed at the end. In addition, the height and, therefore, the cross-sectional area of the distribution channels (48, 50) are reduced in the outward direction. This geometry is technically calculated in such a way that approximately the same amount of air is discharged from all the outlet openings (62), regardless of their distances from the center.

Figure 2 shows a perspective view of a fluid treatment, especially a hot air treatment unit according to one of the preferred embodiments of the invention with an upper manifold (38) and a lower manifold (40), in the that the flow pattern to be adjusted according to the invention is also indicated by the use of arrows schematically and qualitatively. The tissue to be treated (12) is in turn between the two collectors (38, 40). As can be seen, the air is not discharged from the nozzle plates (44) of the two manifolds (38, 40) at right angles to the nozzle plate (44) but at a specific angle, which depends on the relationship of the sum of the air outlet cross sections with the air intake cross section in the manifold (38, 40).

In this case, the flow pattern is symmetric with respect to the center of the manifold (38, 40) with a slightly divergent flow pattern caused by the supply of hot air in the center of the distribution channels (48, 50), which finally produces a uniform treatment result. The divergent angle results in a flow component from the inside to the outside for a part of the hot air that is discharged from the collectors (38, 40), which is more advantageous in terms of elastic tissue treatment (12) compared to a pattern of continuous vertical flow, because it causes a certain dispersion effect in the tissue (12).

With reference to Figure 1 once again, the guidance of the hot air inside the manifold (40) is explained in more detail below.

As mentioned above, hot air is fed through a port (46) into the collectors (38, 40) from the side. This configuration facilitates the removal of the collectors (38, 40) for maintenance purposes. To remove them, the manifolds (38, 40) can be removed (in the drawing) to the right side using a guide rail (not shown) through a maintenance access on the side of the rame range, in which the Port (42) is automatically separated from the hot air supply. While the manifold (40) is reinserted, the port (42) is pressed with a preload against the hot air feed at the end of the travel path, so that a properly sealed connection is guaranteed.

The hot air flowing through the port (46) is guided to the central area of the collectors (38, 40) through the central feed channel (42). This central feed channel (42) decreases in a complementary manner to the widening of the distribution channel (48), with which the central feed channel (42) shares a wall (60). This design of the central feed channel (42) saves material and the overall height of the manifold assembly (40) also does not increase. By gradually decreasing the central feed channel (42) towards the central area, the hot air continues to accelerate as desired.

The air stream is divided into two partial streams that are approximately equal by the divider plate (54) of the stream shortly before the end of the central feed channel (42). The two parts of the current deviate approximately 90 ° using a curve of approximately 90 ° in the divider plate (54) of the current and a corresponding curve in the initial flow guide (56) provided in the housing (64) of the manifold , so that the two parts of the stream initially flow towards the nozzle plate (44) more or less perpendicularly. A second flow guide (52) that is connected to the first flow divider plate (54), then deflects in each case one of the components of the two parts of the current to the left or to the right, so that most hot air currents flow at least to the left and right distribution channels (48, 50).

In order to achieve a deflection of the laminar flow from the center to the two sides as far as possible, an additional flow guide (58) is provided at a leading end of the common wall (60) between the feed channel central (42) and the left distribution channel (48). Said additional flow guide (58) is located approximately in the housing (64) of the manifold.

The second flow guide (52) slightly affects the flow to some of the outlet openings (62) of the nozzle plate (44), that is, the outlet openings (62) that are located in the center. This is offset by the fact that the second flow guide (52) has a passage through which air can pass in the direction indicated by the dashed arrow and can flow into the area of the collector (40) in question.

If the width of the manifold (40) that affects the flow must be adjusted to the actual width of the fabric (12), this can be easily implemented as part of this invention using flow fins at the desired positions in the distribution channels (48 , 50) that prevent air flow in the peripheral areas of the distribution channels (48, 50), in addition to the generally known solutions in which the outlet openings of the outer manifold (62) are closed using a slider or some Another similar device.

Claims (14)

1. Manifold for use in a fluid treatment unit for a tissue, cellulosic material or other fibrous material (12), which has at least one manifold (38, 40) for blowing the fluid on the tissue, cellulosic material or other material fibrous (12) that is continuously guided beyond at least one collector (38, 40), which includes a housing (64) of the collector; a port (46) that is provided on one side of the manifold (38, 40); a nozzle plate (44) having at least one outlet opening (62) through which the fluid is blown on said tissue or cellulosic material (12); and a conduit for guiding the fluid from said port (46) to said nozzle plate (44), characterized by the fact that said conduit has a central feed channel (42) that guides the fluid from said port (46) to a central area of the manifold (38, 40), as well as two distribution channels (48, 50) and at least one flow guide in said central area for uniformly distributing the fluid through said nozzle plate (44) that extends to both sides of the central area and that is fed from said central feed channel (42). 2. Manifold according to claim 1, characterized in that the central feed channel (42) of the manifold (38, 40) is designed as an integral unit. 3. Manifold according to claim 2, characterized in that the height of the two distribution channels (48, 50) decreases sideways and because the central feed channel (42) and one of the channels of distribution (48) are separated by a common wall (60) in at least a part of the area. 4. Manifold according to claim 3, characterized in that the central feed channel (42) has a progressive decrease towards the center which is complementary to the profile of the adjacent distribution channel (48). 5. Manifold according to claims 1 to 4, characterized in that an initial flow guide (54) is provided in the first transition area between the central feed channel (42) and the distribution channels (48 , 50), which divides the fluid stream into two partial streams for the two distribution channels (48, 50) and deflects it about 90 °. 6. Manifold according to claim 5, characterized in that a second flow guide (52) is provided in a second transition area that is connected to the first transition area and protrudes into the two channels of distribution (48, 50), which basically guides the two partial currents symmetrically in the direction of the two distribution channels (48, 50). 7. Manifold according to claim 6, characterized in that the second flow guide (52) is provided with a passage for supplying fluid to the outlet openings (62) that are located directly in the center and in the which flow is partially affected. 8. Manifold according to claims 1 to 4, characterized in that an additional flow guide (58) is provided at a front end of said wall (60) between said central feed channel (42) and the adjacent distribution channel (48). 9. Manifold according to claims 1 to 7, characterized in that the nozzle plate (44) has many oval, circular, rectangular or slot-shaped outlet openings (62). 10. Manifold according to claims 1 to 8, characterized in that the walls of said outlet openings (62) can be normally arranged at the surface of the nozzle plate (44) or longitudinally at an angle with it and in which the outlet openings (62) can be arranged in one or several rows, with or without displacement from one another. 11. Manifold according to claims 1 to 8, characterized in that the nozzle plate (44) has at least one narrow groove as an outlet opening (62) that extends along a large part of the transverse length of the collector. 12. Fluid treatment unit for a tissue or cellulosic material (12), which has at least one manifold according to any one of claims 1 to 11 for blowing the fluid on said material (12) which is continuously guided beyond of said at least one collector. 13. Fluid treatment unit according to claim 12, comprising rows of several manifolds on both sides of the tissue or cellulosic material to be treated, between which spaces are provided for discharging the fluid blown through the outlet openings (62), in which the respective rows of the manifolds (38, 40) are staggered on both sides of each other such that the spaces and the outlet openings (62) are at least partially opposite each other. 14. A method of fluid treatment of a cellulosic tissue or material (12) in which the fluid is continuously blown onto the surface of the cellulosic fibrous tissue or material (12) that is continuously guided by at least one manifold (38, 40 ) which has a nozzle plate (44) characterized by the stages a) guiding a fluid stream through the manifold (38, 40) from one side to a central area; b) basically divide the fluid stream into two partial streams; Y c) distribute the two partial streams to the nozzle plate (44) on both sides of the central area.